Speaker: Prof. Wing Kam Liu（Northwestern University）

Chair Person: Prof. Shaoqiang Tang

Date: Sep. 15, 2015, 14:30-15:30

Place: Room 210 COE Building No.1

Report Introduction:

The report from the National Academy of Engineering titled “Making a World of Difference: Engineering Ideas into Reality” covers the engineering inventions that have transformed lives in the last 50 years, and the breakthroughs that may evolve in the next half century. One of the future trends identified is the development of new materials, which is an integral part in the advancement of the world of design and manufacturing. Additive Manufacturing (AM) enables the printing of 3D complex geometries that are otherwise impossible to manufacture, such as a part within a part. AM comes in many different varieties for numerous material systems including polymeric, biological, cement-based, and metallic materials. These processes typically involve an accumulation of cyclic phase changes, e.g., melting and solidification of metallic particles, until the desired 3D geometry is achieved. This has major implications for concurrent material and product design as it is quite simple using AM to adjust material composition for bulk property improvement or functional grading within the material. While the benefits and impact of using AM to create products is quite clear, the governing physics which drive materials design for additive manufacturing applications to be versatile also greatly complicate our ability to fully characterize the effect of the process on final product performance. This indicates that there is a strong need for robust and efficient modeling and computational approaches which can improve predictive capabilities in these processes. The primary focus of this talk encompasses the specific areas of multiscale modeling, materials characterization, and process modeling for final product performance of additively manufactured metallic components. The proposed approaches are applicable to other material systems with the appropriate amendment of materials physics and manufacturing processes.

About Speaker:
　　Professor Liu is a world leader in multiscale simulation-driven engineering and science. His research has benefitted the understanding and design of nano-materials, engineering material systems and additive manufacturing, biological processes, and the use of organic and inorganic materials for drug delivery systems, bio-sensing, and other diagnostic and therapeutic applications. His ISI and Google citations and H factors are (14,900, 62) and (40,750, 91), respectively. In 2014, Liu is selected as a highly cited researcher in Computer Science and a member of the World’s Most Influential Scientific Minds by Thompson Reuters for the period 2002 through 2012.  Liu’s se­lected honors include 2014 JSCES Grand Prize in recognition of outstanding contributions in the field of computational mechanics, the Honorary Professorship from Dalian University of Technology in 2013, the International Association of Computational Mechanics (IACM) Gauss-Newton Medal; the ASME Dedicated Service Award, the Robert Henry Thurston Lecture Award, the Gustus L. Larson Memorial Award, the Pi Tau Sigma Gold Medal and the Melville Medal, (all from ASME); the John von Neumann Medal and the Computational Structural Mechanics Award from the US Association of Computational Mechanics (USACM); and the IACM Computational Mechanics Award, and the Computational Mechanics Award from Japanese Society of Mechanical Engineers. Currently, Liu is the President of IACM, the Chair of the US National Committee of Theoretical and Applied Mechanics (USNCTAM) and a member of the US Board of International Scientific Organizations. Liu chaired the ASME Applied Mechanics Division and is a past president of USACM. He was the founding Director of the NSF Summer Institute on Nano Mechanics, Nano Materials, and Micro/Nano Manufacturing, Founding Chairman of the ASME NanoEngineering Council, and Founding Director of the Master of Science in Simulation-Driven Engineering Program at Northwestern University. He is the editor of two International Journals and honorary editor of two journals and has been a consultant for more than 20 organizations. Liu has written four books; and he is a Fellow of ASME, ASCE, USACM, AAM, and IACM